Combustion chamber

ABSTRACT

An arrangement for burning substances contained in liquid media and also for burning fine granular substances, in which a plurality of pipes line the inside of a combustion chamber and have a section bent into the interior of the combustion chamber so as to define chamber means in which burner nozzles are located for injecting the substances to be burned in the combustion chamber, while air nozzles in the ceiling of the combustion chamber blow air near the walls of the combustion chamber in counter current flow to the direction in which the burner nozzles flow.

United States Patent Hardemann Dec. 18, 1973 [5 COMBUSTION CHAMBER3,207,102 9/1965 Seibold..... 122/235 B 3 7 4 6 2 [75] Inventor: ManfredHardemann, 0 3/19 8 Jung H X Gummersbach, Germany PrimaryExaminer-Kenneth W. Sprague [73] Asslgnee' gig i ggx gzf gryAttorney-Walter Becker [22] Filed: Oct. 26, 1971 [21] Appl. No.: 192,009[57] ABSTRACT An arrangement for burning substances contained in 30Foreign Application Priority Data liquid e g burfnitlg 1 a stances, in w1c a p ura ity o pipes me t e mm c o 1970 Germany P 20 52 3153 acombustion chamber and have a section bent into the interior of thecombustion chamber so as to define 110/7 klszg22 l7'joi Chamber means inwhich burner nozzles are located Fie'ld 7 28 for injecting thesubstances to be burned in the com- 22 R C bustion chamber, while airnozzles in the ceiling of the combustion chamber blow air near the wallsof the [56] R f es Cted combustion chamber in counter current flow tothe UNTED S EL TES ILATENTS direction in which the burner nozzles flow.3,168,074 2/1965 Kuhner et al. l10/7 X 3 Claims, 1 Drawing FigurePAIENTEU an: 1 8 I975 COMBUSTION CHAMBER The present invention relatesto a combustion chamber for burning substances contained in a liquidmedium or moist fine granular substances, for instance of lye, in whichthe liquid medium to be burned is injected into the combustion chamberin a direction counter to the flow of the combustion air.

For the burning of, for instance, thickened waste liquor from theproduction of cellulose, devices are known according to which with theaid of an atomizing means the liquor is spread toward the ceiling of acombustion chamber whereas the combustion air is discharged in countercurrent flow from this ceiling. In order to protect the liquor-burnernozzles extending into the combustion chamber against the hightemperature of the flue gases developed from the burning of the liquor,the nozzles are surrounded by a mostly watercooled device. The expensesfor such cooling device are rather high. Moreover, the cooling devicemakes difficult the removal of the nozzles which removal becomesnecessary within short intervals in order to clean the nozzles. Anotherdisadvantage of these known devices consists in the high consumption ofcurrent by the cooling water pumps and also in the fact that the heat ofthe cooling water cannot be properly exploited.

It is, therefore, an object of the present invention so to design thecombustion chamber of the above mentioned type that a separate coolingdevice will not be needed for the liquor-burner nozzles.

This object and other objects and advantages of the invention willappear more clearly from the following specification in connection withthe accompanying drawing diagrammatically illustrating a combustionchamber according to the present invention.

The combustion chamber according to the present invention, in which theliquor to be burned is injected into the combustion chamber in adirection counter to the direction of flow of the combustion air, ischaracterized primarily in that at least on one side of the combustionchamber, which is preferably of rectangular cross section, the pipeswhich line the combustion chamber are bent out into the combustionchamber, and that the liquor burner nozzles are inserted into thechamber formed by the bending out of the pipes, while the nozzle headsare located between the individual pipes.

According to a further development of the invention, the pipes which arebent into the combustion chamber are toward the interior of thecombustion chamber covered by a tamped mass, for instance tamping clay.

In view of the bending out of the cooling pipes into the interior of thecombustion chamber, there is created a possibility of positioning theliquor-burner nozzles in an advantageous manner which no longernecessitates an additional cooling of the nozzle elements. The nozzleelements and the auxiliary devices for actuating the same are located soas to be well heatinsulated in the corner or crevice formed by thebending out of the pipes. The cleaning and exchanging of the nozzleelements will with this design of the combustion chamber be possiblewithout difficulties, because practically the nozzle elements arearranged outside the combustion chamber so that an easy accessibility ispossible.

The FIGURE on the drawing shows a vertical section of a combustionchamber for burning liquid media or fine granular substances.

Referring now to the drawing in detail, it will be noted that combustionair is, in a manner known per se, blown into the combustion chamber 1through nozzles 2, 3 which are either parallel to the wall or areinclined toward the outside. In a direction counter to the direction offlow of the combustion air the liquor is injected through nozzles 4. Thenozzles 4 and their auxiliary devices 5 are located in a crevice orcorner 6 which is formed by the fact that the cooling pipes 7 of thecombustion chamber 1 are bent into the interior of the combustionchamber. The particular shaping of the combustion chamber according tothe embodiment shown in the drawing is effected at one side of thepreferably rectangular combustion chamber 1 and extends over the fullwidth of the combustion chamber.

The nozzle elements 4 and their auxiliary devices 5 are located in awell heat insulated area. An additional heat insulation is effected bythe tamping mass 8 applied to the pipe surface within the region wherethe pipes 7 have been bent out into the interior of the combustionchamber. The liquor to be burned enters the combustion chamber betweenthe individual pipes 7 which, as the case may be, may be slightly bentout within the region where the nozzle heads 9 are located.

It is, of course, to be understood that the present invention is, by nomeans, limited to the particular showing in the drawing but alsocomprises any modifications within the scope of the appended claims.

What I claim is:

1. An arrangement for burning substances contained in liquid media andalso for burning fine granular substances, which includes: a combustionchamber, a plurality of pipes lining the inside of said combustionchamber and having a section bent out into the interior of saidcombustion chamber, said bent out sections of said pipes togetherdefining chamber means, and burner nozzles readily exchangeable withoutstandstill and located in said chamber means and having nozzle heads forinjecting the substance to be burned into said combustion chamber, saidburner nozzles respectively having their nozzle head located between theindividual pipes.

2. An arrangement for burning substances contained in liquid media andalso for burning fine granular substances, which includes: a combustionchamber, a plurality of pipes lining the inside of said combustionchamber and having a section bent out into the interior of saidcombustion chamber, said bent out sections of said pipes togetherdefining chamber means, burner nozzles located in said chamber means andhaving nozzle heads for injecting the substance to be burned into saidcombustion chamber, said burner nozzles respectively having their nozzlehead located between the individual pipes, said combustion chamberhaving a ceiling provided with a plurality of openings, and a pluralityof air nozzles respectively mounted in said openings for blowing air inthe direction toward wall portions of said combustion chamber, saidburner nozzles and said air nozzles being so arranged as to blow incounter current direction with regard to each other.

3. An arrangement according to claim 2, which includes a layer oftamping clay applied to cover those portions of said pipes which arebent into the interior of said combustion chamber.

1. An arrangement for burning substances contained in liquid media andalso for burning fine granular substances, which includes: a combustionchamber, a plurality of pipes lining the inside of said combustionchamber and having a section bent out into the interior of saidcombustion chamber, said bent out sections of said pipes togetherdefining chamber means, and burner nozzles readily exchangeable withoutstandstill and located in said chamber means and having nozzle heads forinjecting the substance to be burned into said combustion chamber, saidburner nozzles respectively having their nozzle head located between theindividual pipes.
 2. An arrangement for burning substances contained inliquid media and also for burning fine granular substances, whichincludes: a combustion chamber, a plurality of pipes lining the insideof said combustion chamber and having a section bent out into theinterior of said combustion chamber, said bent out sections of saidpipes together defining chamber means, burner nozzles located in saidchamber means and having nozzle heads for injecting the substance to beburned into said combustion chamber, said burner nozzles respectivelyhaving their nozzle head located between the individual pipes, saidcombustion chamber having a ceiling provided with a plurality ofopenings, and a plurality of air nozzles respectively mounted in saidopenings for blowing air in the direction toward wall portions of saidcombustion chamber, said burner nozzles and said air nozzles being soarranged as to blow in counter current direction with regard to eachother.
 3. An arrangement according to claim 2, which includes a layer oftamping clay applied to cover those portions of said pipes which arebent into the interior of said combustion chamber.